Screw chuck



FIG. 1 is a front, top and left side perspective view of a screw chuck showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view, the bottom and left side being identical in appearance thereto;

FIG. 6 is a front, top, and left side perspective view of the screw chuck of FIG. 1, in an alternate position for use;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a right side elevational view, the bottom and left side being identical in appearance thereto; and

FIG. 11 is a perspective view thereof, exploded for convenience of illustration. 

The ornamental design for a screw chuck, as shown and described. 